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A. H. GRETSCHEL.

I SAW GUARD. No. 285,407. Patented Sept. 25, 1883.

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SAW GUARD.

No. 285,407. Patented Sept. 25, 1883.

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(No Model.) 3 Sheets-Sheet 3. ,A. H. GRETSCHEL.

SAW GUARD. No. 285,407. Patented Sept. 25, 1883.

7A v A k i| |l ll| WQ UNITED STATES PATENT I QFFICE.

ALFRED HERMANN GRETSGHEL, OF LEIPSIG, GERMANY.

SAW-GUARD.

$PECIFICATION forming part of Letters Patent No. 285,407, datedSeptember 25, 1883.

Application filed September 27, 1882. (No model.)

To aZZ whom it may concern.-

- horizontal section at line G G, Fig. II.

Be it known that I, ALFRED HERMANN GRETsoHEL, a citizen of Germany,residing in Leipsic, in the Empire of Germany, have invented a new anduseful Safety-Guard for Gircular Saws, of which the following is aspecification.

In the operation of circular saws is, first, the danger at the front ofthe saw of the hand of .the workman coming in contact with the saw;

and, secondly, the tendency of the wood operated upon moving upward atthe back of the saw, which is likely to produce a detrimental vibrationto the saw-blade, affecting the forward edge of the same and causingmany of the accidents. To obviate these difficulties and to prevent alldanger resulting in this manner is the nature of my invention.

In the accompanying drawings, Figure I represents a general view of acircular saw with my improvement attached. Fig. II represents part of acircular saw with my improved safety-guard on an enlarged scale. Fig.III is a Fig. IV is a vertical section at line N N, Fig. II; and Fig. Vis a vertical section at line C 0, Fig. II.

Similar letters represent similar parts in all the figures.

K represents the circular saw, attached to a suitable table, A, in theusual manner. Above the saw a support, S, is arranged,attached andsuspended from the roof of the building in any convenient manner. At thelower end of this support S a block, B, is attached, through which arod, E, passes, capable of being moved upward or downward, and situateddirectly over the center of the circular saw K. This rod E is providedwith a key or feather, d, and held in any desired position by means ofthe screw-bolt a. end of the rod E a bar, F, is attached parallel withthe circular saw. Forward of the eye D,

Through an eye, D, at the lower near the front of the saw, two or morehubs or blocks, Z Z, are placed upon this bar F, moving on a suitablekey, I), in the bar F,and fixed in any desired position through thescrews h. To these blocks Z Z plates or guards ff are firmly attached,running on each side of the circular saw and extending alittle forwardof the front edge of the saw. By these plates or guards f f all dangerwill be prevented of the front edge of the saw coming in contact withthe hands or any other part of the body of the workman. The guards ffhave vertical or other suitable openings,i i,made in their surface,toallow the escape of the sawdust or shavings through the same. Behind theeye D and back of the conter of the circular saw a block, II, isarranged to slide on the bar F, and capable of being fixed in anydesired position by means of the screw is. Through this block II twobars or rods, 1) p, are made to slide, one 011 each side of the bar F,and consequently on each side of the circular saw, carrying at theirlower ends rollers r r, acted upon by suitable springs, n n, so as toforce said rollers r a" to bear upon the upper side of the wood operatedupon, and prevent thereby the moving or springing upward of thematerial.

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

In combination with a circular saw, the side plates or guards, ff, withsuitable openings, i '5, near the front of the circular saw, and thespring-rods p p,wit-h rollers r r behind the center of the circular saw,said guards f f and rods 11 1) being attached to suitable hubs slidingon a horizontal bar, F, supported by a vertical bar, E, the whole beingarranged to operate in the manner and for the purpose substantially asherein described.

ALFRED HERMANN GRETSCHEL. \Vitnesses:

J ULIUs ALBERT DORING,

HRM. LErrERr.

